<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>重置默认样式</title>
<!--  <link rel="stylesheet" href="reset.css">-->
<!--  保留了一些比较好的默认样式 -->
  <link rel="stylesheet" href="./normalize.css">
</head>
<body>
  <h1>一级样式</h1>
  <h2>二级样式</h2>
  <h3>三级样式</h3>
  <h4>四级样式</h4>
  <a href="#">去百度</a>
</body>
</html>